Comparison of Experimental and Simulated Grain Flows

[+] Author and Article Information
T. G. Drake

Center for Coastal Studies, Scripps Institution of Oceanography, La Jolla, CA 92093-0209

O. R. Walton

Earth Sciences Division, Lawrence Livermore National Laboratory, Livermore, CA 94550

J. Appl. Mech 62(1), 131-135 (Mar 01, 1995) (5 pages) doi:10.1115/1.2895893 History: Received October 19, 1992; Revised July 06, 1993; Online October 30, 2007


Fully three-dimensional computer simulations of identical spheres flowing in an inclined glass-walled channel only slightly wider than a particle diameter successfully reproduce profiles of mean velocity, bulk density, and particle rotations as well as profiles of fluctuating quantities measured from high-speed motion pictures of physical experiments. All simulation parameters are measured experimentally. Both full simulations of the geometry of the physical experiments and simulations using periodic boundary conditions in the downchute direction are used to gather micromechanical information. For these collision-dominated flows, quantitative predictions of the simulations are relatively insensitive to details of the particle-interaction model and particularly the particle stiffness, but are relatively sensitive to extraneous fluid drag forces and the chute geometry.

Copyright © 1995 by The American Society of Mechanical Engineers
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